Engineering Manager
CoreWeave · Sunnyvale, CA / Bellevue, WA
About this role
**Engineering Manager** **CoreWeave** CoreWeave is The Essential Cloud for AI™—built for pioneers by pioneers. The marimo team develops **marimo**, an open-source reactive computational notebook for Python, plus open-source extension packages and **molab**, a cloud-hosted notebook service. --- ## About the Role We’re seeking an **Engineering Manager** to lead the **marimo team** across the open-source ecosystem and **molab**. You’ll mentor engineers, provide regular feedback, support career growth, and help hire and onboard new teammates. You’ll be responsible for **team execution**, **release cadence**, **software quality**, and **responsiveness to users**—helping the team ship improvements rapidly and safely while keeping projects maintainable and aligned with user needs. You’ll also shape engineering priorities and technical direction, strengthen cross-functional collaboration, and guide investment across the open-source marimo ecosystem and molab to help make **marimo an open-source standard** across industry, research, and education. --- ## Key Responsibilities - Lead engineering execution across marimo’s open-source ecosystem and molab, including project staffing, technical planning, dependency management, and release delivery - Manage and mentor engineers; strengthen technical judgment and ownership; support hiring and onboarding - Shape architecture and technical direction; review designs and guide tradeoffs across maintainability, correctness, extensibility, performance, and development speed - Evaluate community feature requests with care, balancing user needs, long-term maintainability, and marimo’s product principles - Improve engineering productivity and software quality (CI/CD, automated testing, code review, release processes) - Establish clear ownership and practices for molab production reliability (observability, incident response, capacity planning, recurring failure resolution) - Ensure effective practices for API design, testing, releases/hotfixes, issue triage, and review of community contributions --- ## Qualifications - 5+ years of software engineering experience - 2+ years of engineering management experience leading senior engineers and technical leads - Proficient in **Python** (language-agnostic fundamentals) - Experience contributing to **open-source** projects - Technical depth to lead design/architecture reviews and evaluate tradeoffs (APIs, state management, scalability, security, reliability) - Experience improving engineering practices (automated testing, CI/CD, code review) - Experience owning production services end to end (performance under load, availability targets, on-call, incident response) - Ability to identify whether processes help or hinder a team and establish clear documented workflows - Strong written and verbal communication skills --- ## Preferred Skills (Nice to Have) - Experience maintaining and growing a widely used open-source project - Experience building developer tools (especially for AI/ML/data) - Passion for working with data and empathy for practitioners and researchers using computational tools like notebooks - Familiarity with observability platforms (Prometheus, Grafana, alerting), Kubernetes, and modern CI/CD - Experience using AI to accelerate engineering processes - Enjoy connecting with users/contributors and translating feedback into product/engineering improvements --- ## What We’re Looking For - You love helping engineers grow, take ownership, and build
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